Concrete-mixer.



G. A. TUERK.

CONCRETE MIXER.

APPLICATION FILED JULY 17,1912.

1,062,936. Patented May 27, 1913.

3 SHEETS-SHEET 1.

\ Ilumnnummnmmuumn mum .www

G. A. TUFRK.r

CON CRETE MIXER.

APPLICATION FILED JULY 17, 1912.

1,062,936. Patented May 27, 1913.

3 SHEETS-SHEET 2.

Ey. 2. y G

Ewen/fors 771. AZM. y Gc/sadwqj Tuer/o,

G. A. TUERK.

7,1912. 1,062,936. Patented May 27, 1913.

3 SHEETS-SHEET 3 lig GUSTAVUS A. TUERK, OF BERLIN, ONTARIO, CANADA.

CONCRETE-MIXER.

lSipecication of Letters Patent.

Patented May 27, 1 913.

Application led .Tully 17, 1912. Serial No. 709,940.

To all whom t may concern Be it known that I, GUsTAvUs A. TUERK, a citizen of the United States of America. and a resident of Berlin, in the Province of Ontario, Canada, have invented certain new and useful Improvements Ain Concrete- Mixers, of which the following is a specification.

This invention relates to concrete mixers of the intermittent batch type, and has for its object, to provide a simple and efficient structural formation of the mixing pot, whereby avery thorough and rapid mixture of material composing the concrete or other like plastic mass is attained in an easy and economical manner.

A further object is to provide a simple and efficient actuating and adjusting mechanism whereby continued rotation is im parted to the mixing pot, and its adjustment from a mixing position to a discharging position, and vice versa, is attained without any interruption of its normal rotation, and with an automatic stoppagewf Ythe adjusting mechanism as the mixing pot reaches its proper mixing and discharging positions.

Another object is to provide a simple and eiiicient means for automatically supplying a batch of material to the mixing pot, as the same reaches its mixing position, all as will hereinafter more fully appear.

In the accompanying drawings: Figure 1, is a vertical sectional elevation on line m-m, Fig. 2, of a concrete mixing apparatus embodying the present invention, the mixing pot and its accessories being shown in the mixing position in full lines, and in dotted lines in a discharging position.A F ig. 2, is a plan view with parts in section, the mixing pot and accessories being turned to a hori- 1 zontal position to more clearly illustrate the present construction.. Fig. 3, is a front elevation of the mixing pot. Fig. 4, is a detail longitudinal section on line -:v, Fig. 2, oft-he raising and lowering mechanism of the mixing pot. Fig. 5, is a detail transverse section onf line 2-2, Fig. 4 of the reverse motion gea-ring of the aforesaid `raising and lowering mechanism. Fig. 6, is a similar view on'line .e3-w3, Fig. 4, of the direct motion gearing. Fig. 7, is a detail elevation showing the pivotal arrangement of the carrying arms of the filling bucket. Fig. 8, is a detail elevation showing an end of the pull link and its connection to a standard of the main frame. Fig. 9, is a detail section on line -w, Fig. 2, illustrating the cam bar operating tappet of the aforesaid raising and lowering mechanism.

Similar reference numerals indicate like parts in the several views.

Referring to the drawings, 1 represents the mixing pot, which in the present inven- `tion consists of a main forward truncated cone portion 2, of an acute type and pentagonal in cross-section; a rear reversely ari ranged cone portion 3 of an obtuse type and also of a pentagonal form in cross-section, and an inner and smaller cone portion 4 of a pentagonal form in cross-section and arranged in a reverse direction to the rear cone. portion 3, to which it is connected at its base. In the present construction the centers of the respective cone portions 2, 3 and 4 are upon a common axis of rotation, as illustrated in Figs. 1, 2 and 3.

, Viththeydescribed formation of the mixing pot, the reversely disposed facets of the polygonal and preferably pentagonal outer shell portions 2 and 3, in conjunction with the inner polygonal and preferably pentagonal cone portion 4, coact to impart to the material undergoing treatment, movements oblique to the longitudinal axis of the pot, in alternately opposite directions, and in so doing attains a very rapid and effective mixture of said materials, with an avoidance of the tendency to clogging where stirring mechanisms are used, and with a. free delivery of the mixed materials when the operation is completed.

5 is a combined operating and carrying shaft extending rearwardly from the mixing pot l, and connected thereto by a hub or spider 6 fitting the recess of the inner cone portion 4 of the mixing pot, as shown.

7 is an oscillating frame preferably of the yoke or U shape form shown, and journaled midway its length in suitable bearings lin standards 8 of the main frame or housing of the apparatus. The carrying shaft 5 aforesaid, is journaled in suitable transverse rails of the rear portion of the frame 7, so as to move in unison with said frame.

as the same is tilted from a mixing to a discharging position of the mixing pot, and vice versa, by means hereinafter described in detail, and the parts just described are so disposed that the mixing ot 1 will be at the forward and open end o the oscillating frame 7, as shown more particularly in Fig. 2. I'

9 is the transversely disposed main driving shaft of the apparatus, one end of which extends axially through one of the journal trunnions of the oscillating frame 7 and carries inside said frame, a spur pinion 10 as shown.

11 is a countershaft journaled in the frame 7 and provided at one end with a spur wheel 12, having driving engagement with the spur pinion 10 aforesaid, and at the other end said countershaft is provided with a bevel pinion 13 having driving. engagement with a bevel gear Wheel 14 on the aforesaid carrying shaft 5 of the mixing pot 1. Vit-h the described arrangement for driving the mixing pot, the oscillating frame 7, supporting said pot, may be turned to any required adjustment without interfering with the continued rotation of the pot.

In ordinary cases the carrying `shaft 5 may constitute the sole support for the mixing pot 1. In cases however of mixing apparatus of large size it is desirable to support the forward end of the mixing pot in its rotation, and in the present construction such support is provided by means as follows: 15 is an endless circular track attached to the forward portion of the mixing pot 1, and 16 is a circular trackway carried by the frame 7 and provided with a series of bearing wheels 17, to support and guide the track 15 in its movement with the mixing pot. 18 is a worm sector fxedly secured to the frame 7 above described, and 19 is a worm shaft journaled on an adjacent standard 8, of the mainsupporting frame and having operative en agement with said worm sector 18 to e ect a pivotal adjustment of the frame 7 and theparts mounted thereon, and which may be effected by a manual rotation of the Worm shaft in the smaller type of apparatus, and in the larger type of the same by the power mechanism new to be described. 20 is a countershaft arranged in parallel relation to the driving shaft 9, and having driving connection with the aforesaid worm shaft 19 by means of a pair of bevel wheels 21, a countershaft 22, and a pair` of spur wheels 23, as shown in Figs. 2 and 4. 24 and 25 are spur wheels arranged loosely and in spaced relation upon the countershaft 20 and provided with individual clutch members 26 and 27 of any usual and suitable form. 28 is a spur pinion secured to .the main shaft 9 and meshing with the spur wheel 24 to impart direct rotation thereto. 29 is another spur pinion secured to the main shaft 9, and having driving engagement with an idler pinion 30 journaled on the main frame, and which in turn meshes with and drives the aforesaid spur wheel 25 in a direction opposite to t-he spur wheel 24 above described. In the construction shown in the drawings the spur wheel 25 and spur pinion 29 are arranged out of line, while the idler pinion 30 is made with a face wide enough to separately engage the spur wheel 25 and pinion 29. 31 is a sliding clutch member arranged upon the countershaft 20, intermediate of the spur wheels 24 and 25 and their individual clutch members 26 and 27 and adapted for alternating engagement with said last mentioned members. The clutch member 3l is connected to the countershaft 20 by a tongue and groove, or other usual connection, for attaining a driving connection between the parts while permitting a sliding movement of said clutch member 31 upon the shaft 20. 32 is a shift lever pivoted onvth'e main frame of the apparatus, and operatively connected to the sliding clutch member 31, and adapted for manual actuation to move the said clutch member 31 into operative engagement with one or the other of the before described clutch members 26 and 27, to cause through the intermediate mechanism heretofore deL scribed, an 'oscillatory movement of the frame 7 and mixing pot 1,.to a mixing position as shown in full lines in Fig. 1,

and from said mixing position to a discharging position shown in dotted lines in said Fig. l. Said shift lever is also adapted to move the clutch member 31 to an intermediate position and out of engagement with either of the clutch members 26, 27, to stop the active operation of the mechanism in raising or lowering the mixing pot and leaving the same in a rotating condition at any degree of inclination desired.

'loo great an oscillatory movement of the mixing pot 1 and its carrying frame 7, in one direction or the other, through the power mechanism just described is autolnat-ieally prevented by means as follows: 33 are counter part cam bars connected to the shaft lever 32 at opposite sides of its pivot, and having sliding support in guide brackets 34 on one of the standards 8 of the apparatus. The free ends of said bars 33 are formed with cam heads 35, as shown in Fig. 9. 36 are counterpart tappet projections on one side of the supporting frame 7, and adapted to move in a circular path embracing the cam heads 35 above described, so

that as the said frame 7 reaches a predeter 'matically released, as above described. 37

is a fillin bucket into which the materials to form a atch of concrete is initially introduced. In the present im rovement said bucket is provided with si e trunnions 38 by which it is pivotally lmounted in supporting arms 39, which in turn are attached to the carrying frame 7 of the mixing pot 1, in a manner which admits of a limited independent movement of said arms 39 with relation to the frame 7. In the precise construction shown in the drawings, the frame 7 is formed with flaring recesses 40, in which the arms 39 are disposed and attached at their rear ends by pivot studs or bolts 41. Said construction permits of a limited movement of the bucket when an accidental obstruction is met, and is intended to avoid a breakage of parts due to such obstruction. 42 is a crank arm on one of the trunnions 38 of the filling bucket, and 43 is a pull-bar connected at one end to said crank arm 42, and at the other end to an adjacent standard 8 of the machine by a stud 44 and elon ated slot 4 5, as illustrated in Figs. 2 and 8. ith the described construction a tipping motion is automatically imparted to the bucket 37.

as it nears the end of its upward movement along with the mixing pot 1 and carrying frame 7, to empty its contents into said mixing pot.

The general operation of the apparatus is as follows: With the mixing pot 1 and its carrying frame'7 in the lower position indicated in dotted lines in Fig. 1, a charge of material is introduced into the filling bucket 37. The operator then shifts the shift lever 32, to bring the sliding clutch member 31 with the clutchmember 26, to cause an active operation of the worm shaft 19 and worm sector 18, to in turn effect an upward oscillation of the carrying frame 7 and mixing pot l, into the inclined position shown in full lines in Fig. 1. As the said parts near such raised or mixing position, the filling bucket 37 is automatically tilted in the manner heretofore described to discharge its contents into the mixing pot 1. Immediately following such filling operation, a tappet projection 36 engages a cam head 35 and actuates its cam bar 33 to move the shift lever 32, which in turn moves the sliding clutch member 31 out of its previously engaged condition wit-h the clutch member 26, an into a dormant position between the opposed clutch members 26 and 27. Such operation leaves the mixing pot 1 in its elevated and inclined position above described and in a state of continued rotation through the driving mechanism heretofore described. With the mixing operation completed, the operator shifts the lever 32 in an o posite direction to that first described, to bring the sliding clutch member 31 into engagement with the other clutch member 27, to cause an active operation of the worm shaft 19 and worm sector 18 in a direction opposite to that first described, and a lowering of the mixing pot 1 carrying frame 7 and filling bucket 37 to the lowered position first described, and with an automatic discharge of the mixed concrete from the constantly rotating mixing pot 1, into a suitable receiver. As the parts just described near their lowered position, the other tappet projection 36, engages t-he other cam head 35 and actuates its cam bar 33, to move the shift lever 32, and in turn the sliding clutch member 31 out of its previously enga ed condition with the clutch member 27 The parts being in a position for another cycle of the above described operation.

Having thus fully described my said inventicn what I claim as new and desire to secure by Letters Patent, is

1. A mixing pot of the class described,

consisting of a main forward truncated cone portion of an acute type and pentagonal in cross section, a reverse y arranged rear cone portion of an obtuse type and penta onal in cross-section, and an inner and smal er cone portion of a pentagonal form in cross section and disposed in a reverse direction to the aforesaid rear portion and connected thereto, substantially as set forth.

2. A mixing pot of the class described consisting of a main forward truncated cone lportion of an acute type a-nd polygonalin cross-section, a reversely arranged rear cone portion of an obtuse type and poly onal in cross-section, and an inner and smal er cone portion of a polygonal form in cross-section and disposed in a reverse direction to the aforesaid rear portion and connected thereto, substantially as set forth.

3. In a concrete mixer, an open ended mixing pot, an oscillatory supporting frame for said pot, a main frame having journals for said supporting frame, a carrying shaft extending rearwardly from the mixing pot and journaled in said supporting frame, a drivlng shaft extending axially through a journal trunnion of said frame, operative connections between the driving and carrying shafts aforesaid, carrying arms extending from the forward end of the supporting frame, a filling bucket pivotally mounted at the forward ends of said arms, and means for automatically tilting said bucket as the forward end of the supporting frame is tilted upwardly, substantlally as set forth.

4. In' a concrete mixer, an open ended mixing pot, an oscillatory supporting frame for sald pot, a main frame having journals for said supporting frame, a carrying shaft extending rearwardly from the mixing pot and journaled in said supporting frame, a driving shaft extending axially through a journal trunnion of sald frame, operative connections between the driving and carrying shafts aforesaid, carrying arms pivoted to the forward end of the supporting frame, means for limiting the independent pivot-al movement of said arms, a filling bucket pivotally mounted on the forward ends of said arms, and means for automatically tilting said bucket as the forward end of the supporting frame is tilted upwardly, substantially as set forth.

5. In a concrete mixer, an open ended mixing pot, an oscillatory supporting frame for said pot, a main frame having journals for said supporting frame, a carrying shaft extending rearwardly from the mixing pot and journaled in said support-ing frame, a driving shaft extending axially through a journal trunnion of said frame, operative connections between the driving and carrying shafts aforesaid, carrying arms pivoted in Haring recesses in the supporting frame, a filling bucket pivotally mounted on the forward ends of said arms, and means for automatically tilting said bucket as the forward end of the supporting frame is tilted upwardly, substantially as set forth.

6. In a concrete mixer, an open ended mixing pot, an oscillatory supporting frame for said pot, a main frame having journals for said supporting frame,acarrying shaft ex tending rearwardly from the mixing pot and journaled in said supporting frame, a driving shaft extending axially through a journal trunnion of said frame, operative connections between the driving and carrying shafts aforesaid, carrying arms extending from the forward end of the supporting frame, a filling bucket pivotally mounted at the forward ends of said arms, and means for automatically tilting said bucket as the forward end of the supporting frame is tilted upwardly, the same comprising a crank arm on one of the trunnions of the bucket and a pull link connected to said crank arm and to the main frame of the machine, substantially as set forth.

Signed at Chicago, Illinois, this 13th day of July 1912.

GUSTAVUS A. TUERK. Witnesses:

ROBERT BURNS, HENRY Mon. 

